Stud.



E. FILIPEK.

STUD.

APPLICATION FILED rmms, 1913.

1,073,032. Patented Sept. 9, 1913.

COLUMBU PLANMRAFH co, WASHINGTON, n. c.

UNI ED STATES PATENT onnron;

EUGEN FILIPEK, or rronznEIM. GERMANY.

STUD.

Specification of Letters Patent. Patented $8151]. 9, 1913- Applicationfiled February 26, 1913. Serial No. 750,866. i

others skilled in the art to which it appertains to make and use thesame.

My invention relates to studs of that class in which a pin carrying thehead of the stud is held in position in the base of the stud by a pairof symmetrically movable spring actuated clamping slides. According tomy invention these clamping slides are guided in each other positivelyand in a straight line by means of legs; moreover on both sides of thehole receiving the/head pin projections are provided serving for moreaccurately guidin for limiting their movements;

In the annexed drawing Figure 1 is a bottom view of a stud embodying myinvention, the bottom plate of the base being removed. Fig. 2 is avertical section of the stud and Fig. 3 shows a detail.

1 is the base and 2 is the head of the stud carried by a pin 3. havingpreferably a thickened lower end 4 or a circumferential groove justabove its lower end.- The base is preferably provided with a sleeve 5having a projecting' rim or flange 5 at its upper end.

a The clamping device mounted within the base consists of two clampingslides 6, 7 substantially U shaped and located in one plane, one leg ofeach of them engaging between the two legs of the other. One of the legsof each of the clamping slides projects radially from the base as shownat 8 and 9 respectively, while the other leg let and 15 respectively ofeach of the clamping slides carries a clamping edge 12 and 13respectively. These clamping edges are opposite.

each other and at substantially right angles to the legs 14, 15 of theclamping slides carrying them.

10 and 11 are springs mounted in the base and tending to force theclamping slides toward each other so that the clamping edges 12, 13engage with the thickened end of the pin 3 or with its circumferentialgroove. By pressing inward the ends 8, 9 of the clamping slides theclamping edges are separatedand disengaged from the pin 3. When movingtoward each other the clamping o" the clamping slides and slides arepositively and exactly guided by their legs engaging with each other.For securely guiding the legs 14, 15 of the clamping slides when thelatter are moving the one away from the other guide pins 17 18 maybeprovided in the base, on each side 7 of the opening 16 into which thepin 3 is inserted, these guide pins 17, 18 engage with the inner sidesof the legs 15 and 14 respectively and are preferably formed integralwith the washer 20. These guide pins 17, 18 serve also as stops forlimiting the outward movement of the clamping slides and clamping edgesunder the act-ion of the springs 10 and 11 so that the clamping edgesare normally (that is to say when the clamping slides are entirely leftto the action of the springs 10, 11) at some distance from each otherand that on inserting the pin 3 the clamping edges are readily movedapart by the thickened end 4 of the pin 3 passing between them. Theclamping edges are then moved toward each other by the springs 10 and 11engaging with the pin above its thickened end 4 or into thecircumferential groove on the lower end of this pin thereby securelyholding the latter in position.

- For holding the clamping slides in one plane suitable washers 20 and20 guiding the said slides on their top and bottom sides are provided inthe base of the button; central holes in these washers permit the pin 3to pass through. The sleeve 5 guides the pin 3 on inserting the sameinto the base and the projecting rim or flange 5 of the sleeve preventsthe sleeve from slipping out of the'button hole before or during theinsertion of thestud head. The head 2 is secured to the base by simplyinserting the pin 3 into the openings 16 whereby as above explained theclamping edges are first forced apart whereupon thesprings 10, 11 movethem toward each other causing them to engage with and securely hold thepin in the base. For taking out the stud the clamping slides are forcedapart by pressing inward their leg ends Sand 9 when the pin one leg ofeach of such slides entering be- 7 tween the two legs of the otherclamping said clamping slides whereby theiat-tef are 10 slide and theother leg of each clamping moved toward each ether.

slidefprojecting radially from the base, In testimony whereof, I affix'iny signagulde pins secured in the base on opposite ture,1n presence oftwo Witnesses.

vsides of the said openin and on the inner sides of the first named l gsof the clamping EUGEN FILIPEKY slides, means for guiding such clampingWitnesses:

slides in one plane in the base and springs JOSEPH PF I F R, mounted inthe base and engaging wlth the ERNST KUHNHE.

Oiipies of this patent may be obtained for five cents each, byaddressing the Cemmissiener of Patents.

Washington, D. 0.

